Finding the Fourth Proportional to 5,189.46, 7,161.50 and 2,831.59

Step by Step Solution

1. Step 1: Write the proportion equation
   5,189.46 : 7,161.50 = 2,831.59 : x
2. Step 2: Convert to fraction form
   5,189.46/7,161.50 = 2,831.59/x
3. Step 3: Cross multiply
   5,189.46x = 7,161.50 × 2,831.59
4. Step 4: Simplify right side
   5,189.46x = 20,278,381.82
5. Step 5: Solve for x
   x = 20,278,381.82/5,189.46
6. Step 6: Final answer
   x = 3,907.61